On top of the above, you also need to change the following in settings.php (few lines before the ones mentioned in step 4 above):
<input type="hidden" name="page_options" value="slideFx,enableIR,irURL,irWidth,irHeight,irShuffle,irLinkfromdisplay,irShownavigation,irShowicons,irWatermark,irOverstretch,irRotatetime,irTransition,irKenburns,irBackcolor,irFrontcolor,irLightcolor,irScreencolor,irAudio,irXHTMLvalid" />
To:
<input type="hidden" name="page_options" value="slideFx,enableIR,irURL,irWidth,irHeight,irShuffle,irLinkfromdisplay,irShownavigation,irShowicons,irWatermark,irOverstretch,irRotatetime,irTransition,irKenburns,irBackcolor,irFrontcolor,irLightcolor,irScreencolor,irAudio,irXHTMLvalid,irPause" />
That is, add “irPause” to the list of fields
